package static05;
//甲程序员写的圆得代码,圆周率PI=3.1415926
public class Circle {
    private double r;

    public Circle(double r) {
        this.r = r;
    }

    public double getArea() {
        //return 3.1415926 * r * r;
        return Constant.PI * r * r;
    }
}